A transformer which can produce 8V from a 240v a.c. suppl...
A transformer which can produce 8V from a 240v a.c. supply, has an efficiency of 80%. If the current in the secondary coil is 15A, calculate the current in the primary coil.
0.625A
1.600A
2.500A
6.250A
Correct answer is A
Efficiency = IsVsIpVp x 100
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